:root{--brand: #1d6ff2;--brand-2: #4b8ef7;--brand-dark: #1259c4;--bg: #f4f6fb;--card: #ffffff;--text: #1a1a1a;--text-2: #6b7280;--text-3: #9aa0ab;--line: #eceef2;--price: #ff4d2f;--ok: #16a34a;--warn: #f59e0b;--danger: #ef4444;--radius: 12px;--shadow: 0 1px 3px rgba(0, 0, 0, .06);--font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif}*{box-sizing:border-box;margin:0;padding:0}html,body{font-family:var(--font);color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button{font-family:inherit;cursor:pointer}img{display:block}input,select,textarea{font-family:inherit;font-size:15px}.h5-page{max-width:520px;margin:0 auto;min-height:100vh;background:var(--bg);padding-bottom:64px}.h5-header{position:sticky;top:0;z-index:30;background:#fff;padding:10px 14px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:10px}.h5-header h1{font-size:18px;flex:1}.h5-header .back{font-size:14px;color:var(--text-2);background:none;border:none}.page-title{padding:12px 14px 4px;font-size:17px;font-weight:700}.bottom-nav{position:fixed;bottom:0;left:0;right:0;z-index:40;background:#fff;border-top:1px solid var(--line);display:flex;max-width:520px;margin:0 auto}.bottom-nav a{flex:1;padding:8px 0 10px;text-align:center;font-size:11px;color:var(--text-3)}.bottom-nav a.active{color:var(--brand);font-weight:600}.bottom-nav .ico{font-size:20px;line-height:1;display:block;margin-bottom:2px}.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);margin:10px 12px;padding:14px}.card-tight{margin:8px 12px}.section-title{font-size:15px;font-weight:700;padding:14px 14px 6px;display:flex;align-items:center;justify-content:space-between}.section-title .more{font-size:12px;color:var(--text-3);font-weight:400}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:none;border-radius:8px;padding:10px 16px;font-size:14px;font-weight:600;background:var(--brand);color:#fff}.btn.block{width:100%}.btn.ghost{background:#eef3fd;color:var(--brand)}.btn.warn{background:var(--warn)}.btn.danger{background:var(--danger)}.btn.price-btn{background:var(--price)}.btn.sm{padding:6px 12px;font-size:13px}.btn:disabled{opacity:.6;cursor:not-allowed}.tag{display:inline-block;padding:2px 7px;border-radius:4px;font-size:11px;background:#eef3fd;color:var(--brand)}.tag.gold{background:#fdf3e4;color:#b7791f}.tag.gray{background:#f1f2f4;color:var(--text-2)}.tag.price{background:#fff0ed;color:var(--price)}.tag.free{background:#e8f7ee;color:var(--ok)}.course-card{display:flex;gap:12px;background:#fff;border-radius:var(--radius);padding:12px;margin:8px 12px;box-shadow:var(--shadow)}.course-card .cover{width:104px;height:72px;border-radius:8px;object-fit:cover;flex-shrink:0;background:#e9edf5}.course-card .body{flex:1;min-width:0;display:flex;flex-direction:column;justify-content:space-between}.course-card .title{font-size:15px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.course-card .meta{font-size:12px;color:var(--text-3);display:flex;gap:8px;align-items:center}.course-card .row{display:flex;align-items:center;justify-content:space-between}.course-card .price{color:var(--price);font-weight:700;font-size:15px}.course-card .price.free{color:var(--ok)}.course-card .play{color:var(--brand);font-size:13px}.banner{margin:10px 12px;border-radius:var(--radius);overflow:hidden;position:relative}.banner img{width:100%;height:140px;object-fit:cover}.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;padding:4px 12px 10px}.cat-item{background:#fff;border-radius:10px;padding:10px 4px;text-align:center;box-shadow:var(--shadow)}.cat-item .cicon{font-size:26px}.cat-item .cname{font-size:13px;margin-top:4px;color:var(--text)}.profile-hero{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;border-radius:14px;margin:12px;padding:18px;display:flex;gap:14px;align-items:center}.profile-hero .avatar{width:60px;height:60px;border-radius:50%;background:rgba(255,255,255,.25);object-fit:cover;flex-shrink:0}.profile-hero .nick{font-size:17px;font-weight:700}.profile-hero .no{font-size:12px;opacity:.85;margin-top:2px}.profile-hero .pts{font-size:13px;margin-top:6px}.menu-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:4px;background:#fff;border-radius:var(--radius);margin:8px 12px;padding:8px 0;box-shadow:var(--shadow)}.menu-grid a{text-align:center;padding:8px 0;color:var(--text-2);font-size:12px}.menu-grid .mi{font-size:22px;display:block;color:var(--brand);margin-bottom:3px}.menu-list{background:#fff;border-radius:var(--radius);margin:8px 12px;overflow:hidden;box-shadow:var(--shadow)}.menu-list a{display:flex;align-items:center;justify-content:space-between;padding:13px 14px;border-bottom:1px solid var(--line);font-size:14px}.menu-list a:last-child{border-bottom:none}.menu-list .lbl{display:flex;align-items:center;gap:10px}.menu-list .li{width:18px;text-align:center;color:var(--brand)}.menu-list .arrow{color:var(--text-3);font-size:13px}.field{margin:10px 12px}.field label{display:block;font-size:13px;color:var(--text-2);margin-bottom:6px}.field input,.field select,.field textarea{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:8px;background:#fff}.field textarea{min-height:80px}.form-pad{padding:4px 0 20px}.row-item{display:flex;gap:12px;background:#fff;border-radius:var(--radius);margin:8px 12px;padding:12px;box-shadow:var(--shadow);align-items:center}.row-item .r-body{flex:1;min-width:0}.row-item .r-title{font-size:14px;font-weight:600}.row-item .r-sub{font-size:12px;color:var(--text-3);margin-top:3px}.row-item .r-right{text-align:right;font-size:13px;color:var(--text-2)}.player-wrap{background:#000;position:relative}.player-wrap video,.player-wrap audio{width:100%}.player-wrap.audio{background:linear-gradient(135deg,var(--brand-dark),var(--brand));padding:30px 16px;text-align:center}.player-wrap.audio .acover{width:120px;height:120px;border-radius:50%;margin:0 auto 12px;object-fit:cover}.player-wrap.audio audio{margin-top:10px}.gate-box{background:#fff;border-radius:var(--radius);margin:10px 12px;padding:18px;text-align:center}.gate-box .g-price{color:var(--price);font-size:22px;font-weight:800}.gate-tabs{display:flex;background:#eef2fb;border-radius:10px;margin:12px 12px 0;padding:3px}.gate-tabs button{flex:1;border:none;background:transparent;padding:9px 0;border-radius:8px;font-size:14px;color:var(--text-2)}.gate-tabs button.active{background:#fff;color:var(--brand);font-weight:600;box-shadow:var(--shadow)}.pw-box{margin:10px 12px;background:#fff;border-radius:var(--radius);padding:14px}.pw-box input{width:100%;padding:10px;border:1px solid var(--line);border-radius:8px;margin-bottom:10px}.chapter-list{background:#fff;border-radius:var(--radius);margin:8px 12px;overflow:hidden}.chapter-list .ch{display:flex;align-items:center;gap:10px;padding:12px 14px;border-bottom:1px solid var(--line);font-size:14px}.chapter-list .ch:last-child{border-bottom:none}.chapter-list .ch .l{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.chapter-list .ch.locked{color:var(--text-3)}.chapter-list .ch.playing{color:var(--brand);font-weight:600}.seg-tabs{display:flex;background:#fff;border-radius:12px;margin:10px 12px;padding:3px;box-shadow:var(--shadow)}.seg-tabs button{flex:1;border:none;background:transparent;padding:10px 0;font-size:14px;color:var(--text-2);border-radius:10px}.seg-tabs button.active{background:var(--brand);color:#fff;font-weight:600}.toast{position:fixed;top:60px;left:50%;transform:translate(-50%);background:rgba(0,0,0,.82);color:#fff;padding:9px 16px;border-radius:8px;font-size:13px;z-index:99;max-width:80%}.empty{text-align:center;color:var(--text-3);padding:40px 0;font-size:14px}.loading{text-align:center;color:var(--text-3);padding:30px 0}.admin-wrap{display:flex;min-height:100vh}.admin-side{width:220px;background:#14171f;color:#c8cdd7;flex-shrink:0;display:flex;flex-direction:column;position:sticky;top:0;height:100vh}.admin-side .brand{padding:18px 16px;font-size:17px;font-weight:700;color:#fff;border-bottom:1px solid #232832}.admin-side nav{flex:1;overflow-y:auto;padding:8px 0}.admin-side a{display:block;padding:11px 18px;font-size:14px;color:#c8cdd7}.admin-side a:hover{background:#1d222e}.admin-side a.active{background:var(--brand);color:#fff}.admin-side .grp{font-size:11px;color:#6b7380;padding:14px 18px 4px;text-transform:uppercase}.admin-main{flex:1;background:#f4f6fb;padding:18px;overflow-x:auto}.admin-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.admin-top h2{font-size:20px}.admin-card{background:#fff;border-radius:10px;padding:16px;box-shadow:var(--shadow);margin-bottom:14px}table.tbl{width:100%;border-collapse:collapse;font-size:13px}table.tbl th{text-align:left;padding:9px 10px;color:var(--text-2);background:#f8f9fb;border-bottom:1px solid var(--line);font-weight:600;white-space:nowrap}table.tbl td{padding:9px 10px;border-bottom:1px solid var(--line);vertical-align:middle}table.tbl tr:last-child td{border-bottom:none}.admin-bar{display:flex;gap:8px;align-items:center;margin-bottom:12px;flex-wrap:wrap}.admin-bar input,.admin-bar select{padding:8px 10px;border:1px solid var(--line);border-radius:6px;background:#fff}.tool-btn{background:var(--brand);color:#fff;border:none;border-radius:6px;padding:8px 12px;font-size:13px}.tool-btn.ghost{background:#eef3fd;color:var(--brand)}.tool-btn.red{background:#fff0ed;color:var(--danger)}.stat-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px;margin-bottom:14px}.stat-card{background:#fff;border-radius:10px;padding:16px;box-shadow:var(--shadow)}.stat-card .v{font-size:24px;font-weight:700}.stat-card .k{color:var(--text-2);font-size:13px;margin-bottom:4px}@media (max-width: 760px){.admin-side{width:78px}.admin-side .brand,.admin-side .grp,.admin-side a span{display:none}.admin-side a{text-align:center;padding:14px 4px;font-size:18px}.admin-main{padding:10px}}